| /* |
| * Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package com.sun.naming.internal; |
| |
| import sun.security.util.SecurityProperties; |
| |
| import javax.naming.Reference; |
| import java.io.ObjectInputFilter; |
| import java.io.ObjectInputFilter.FilterInfo; |
| import java.io.ObjectInputFilter.Status; |
| |
| /** |
| * This class implements the filter that validates object factories classes instantiated |
| * during {@link Reference} lookups. |
| * There is one system-wide filter instance per VM that can be set via |
| * the {@code "jdk.jndi.object.factoriesFilter"} system property value, or via |
| * setting the property in the security properties file. The system property value supersedes |
| * the security property value. If none of the properties are specified the default |
| * "*" value is used. |
| * The filter is implemented as {@link ObjectInputFilter} with capabilities limited to the |
| * validation of a factory's class types only ({@linkplain FilterInfo#serialClass()}). |
| * Array length, number of object references, depth, and stream size filtering capabilities are |
| * not supported by the filter. |
| */ |
| public final class ObjectFactoriesFilter { |
| |
| /** |
| * Checks if serial filter configured with {@code "jdk.jndi.object.factoriesFilter"} |
| * system property value allows instantiation of the specified objects factory class. |
| * If the filter result is not {@linkplain Status#REJECTED REJECTED}, the filter will |
| * allow the instantiation of objects factory class. |
| * |
| * @param factoryClass objects factory class |
| * @return true - if the factory is allowed to be instantiated; false - otherwise |
| */ |
| public static boolean canInstantiateObjectsFactory(Class<?> factoryClass) { |
| return checkInput(() -> factoryClass); |
| } |
| |
| private static boolean checkInput(FactoryInfo factoryInfo) { |
| Status result = GLOBAL.checkInput(factoryInfo); |
| return result != Status.REJECTED; |
| } |
| |
| // FilterInfo to check if objects factory class is allowed by the system-wide |
| // filter. Array length, number of object references, depth, and stream size |
| // capabilities are ignored. |
| @FunctionalInterface |
| private interface FactoryInfo extends FilterInfo { |
| @Override |
| default long arrayLength() { |
| return -1; |
| } |
| |
| @Override |
| default long depth() { |
| return 1; |
| } |
| |
| @Override |
| default long references() { |
| return 0; |
| } |
| |
| @Override |
| default long streamBytes() { |
| return 0; |
| } |
| } |
| |
| // Prevent instantiation of the factories filter class |
| private ObjectFactoriesFilter() { |
| throw new InternalError("Not instantiable"); |
| } |
| |
| // System property name that contains the patterns to filter object factory names |
| private static final String FACTORIES_FILTER_PROPNAME = "jdk.jndi.object.factoriesFilter"; |
| |
| // Default system property value that allows the load of any object factory classes |
| private static final String DEFAULT_SP_VALUE = "*"; |
| |
| // System wide object factories filter constructed from the system property |
| private static final ObjectInputFilter GLOBAL = |
| ObjectInputFilter.Config.createFilter(getFilterPropertyValue()); |
| |
| // Get security or system property value |
| private static String getFilterPropertyValue() { |
| String propVal = SecurityProperties.privilegedGetOverridable(FACTORIES_FILTER_PROPNAME); |
| return propVal != null ? propVal : DEFAULT_SP_VALUE; |
| } |
| } |